If I wanted something like this I’d get a MacBook Air.
MacBook Air, 11” w/128GB = $899.00 Runs OS X Yosemite + USB 3.0 connectivity and Thunderbolt.
iPad 2 Air, 9.7” display, WiFi only, 128GB = $699 + this $169 gadget = $868.00 Runs iOS 8 + NO USB connectivity or Thunderbolt
Both can use my iPhone 6 as a hotspot and both can use my iPhone 6 for Handoff, Continuity, and syncing.
Any questions? I don’t have any.